/*
 * Copyright 2002-2019 Intel Corporation.
 * 
 * This software is provided to you as Sample Source Code as defined in the accompanying
 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")
 * section 1.L.
 * 
 * This software and the related documents are provided as is, with no express or implied
 * warranties, other than those that are expressly stated in the License.
 */

#include "pin.H"
#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
using std::ofstream;
using std::string;
using std::ios;
using std::hex;
using std::cerr;
using std::dec;
using std::endl;

/* ===================================================================== */
/* Commandline Switches */
/* ===================================================================== */

KNOB<string> KnobOutputFile(KNOB_MODE_WRITEONCE, "pintool",
    "o", "block_realTime_signals.outfile", "specify file name");

ofstream TraceFile;
/* ===================================================================== */

INT32 Usage()
{
    cerr <<
        "This pin tool tests blocking the real time signals.\n"
        "\n";
    cerr << KNOB_BASE::StringKnobSummary();
    cerr << endl;
    return -1;
}
        
UINT32 threadCounter=0;

VOID AttachedThreadStart( VOID *sigmask, VOID *v)
{
    /* Assuming that 40 is real time signal in both glibc and pincrt */
    int REALTIMESIGNAL = 40;
    TraceFile << "Thread counter is updated to " << dec <<  ++threadCounter << endl;
    if ((sigismember((sigset_t*)sigmask, REALTIMESIGNAL)) && (sigismember((sigset_t*)sigmask, REALTIMESIGNAL + 1 ) == false))
        TraceFile << "signal Blocked OK  " << REALTIMESIGNAL  << " and signal " << REALTIMESIGNAL + 1 << "is not Blocked" << endl;
    else
        PIN_ExitProcess(-1);
}

int PinReady(unsigned int numOfThreads)
{
	return (threadCounter == numOfThreads)?1:0;
}

/* ===================================================================== */
// Called every time a new image is loaded
// Look for routines that we want to probe
VOID ImageLoad(IMG img, VOID *v)
{
	RTN rtn = RTN_FindByName(img, "ThreadsReady");
	if (RTN_Valid(rtn))
	{
		if (!RTN_IsSafeForProbedReplacement(rtn))
		{
			fprintf(stderr, "Can't replace ThreadsReady\n");
            PIN_ExitProcess(-1);
		}
		RTN_ReplaceProbed(rtn, AFUNPTR(PinReady));
	}
}

/* ===================================================================== */

int main(int argc, CHAR *argv[])
{
    PIN_InitSymbols();

    if( PIN_Init(argc,argv) )
    {
        return Usage();
    }

    TraceFile.open(KnobOutputFile.Value().c_str());
    TraceFile << hex;
    TraceFile.setf(ios::showbase);

    IMG_AddInstrumentFunction(ImageLoad, 0);
    PIN_AddThreadAttachProbedFunction(AttachedThreadStart, 0);
    PIN_StartProgramProbed();
    
    return 0;
}

/* ===================================================================== */
/* eof */
/* ===================================================================== */
